Free Sample Mosfet For Usb-C Charger Cross Reference Supplier & Product

Featured USB-C Adapter MOSFET Products

Discover high-efficiency silicon MOSFETs optimized for primary switching and synchronous rectification.

Custom WSR110N20 N-channel 200V 110A TO-220-3L WINSOK MOSFET Product

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ODM WST2335A WST3417 WST6225 P-channel -20V -5.8A SOT-23L WINSOK MOSFET

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OEM WST3415A WST3415 P-channel -20V -5.3A SOT-23-3L WINSOK MOSFET

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Custom WSK78P10 P-Ch -100V -78A TO-263-2L WINSOK MOSFET

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OEM WSF4012 N+P channel TO-252-4L WINSOK MOSFET Manufacturer

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Free Sample WSR180N10 N-channel 100V 180A TO-220-3L WINSOK MOSFET

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China STL52DN4LF7AG STL64DN4F7AG PJQ5442 PDC496X N-channel DFN5X6-8

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Custom WSD2068DN23 WSD2098DN23 Dual N-Ch -20V 7.5A DFN2X3-6S

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Macro-Industry Solutions & Power Electronics Evolution

The global transition toward standardized charging interfaces has achieved its ultimate milestone with the universal adoption of USB Type-C and USB Power Delivery (PD) protocols. From smartphones and tablets to high-performance ultrabooks, the demands placed upon charger power densities, efficiency thresholds, and thermal envelopes have grown exponentially. Today's consumer electronics require power adapters to be compact, lightweight, and ultra-efficient.

To achieve these goals, design engineers must minimize energy dissipation at every conversion stage. This has driven the industry from traditional silicon diodes toward highly integrated, low $R_{DS(on)}$ Silicon MOSFETs and wide-bandgap semiconductor devices. WINSOK’s extensive range of medium- and low-voltage MOSFETs, developed under high-precision packaging criteria, addresses these high-frequency applications directly. They enable synchronous rectification (SR) and primary switching with minimum parasitics.

Did you know? Transitioning from passive Schottky diode rectification to Active Synchronous Rectification utilizing low $R_{DS(on)}$ MOSFETs can boost charger conversion efficiency by up to 4%, drastically dropping thermal dissipation in high-power 65W to 240W USB-C PD 3.1 designs.

Efficiency Over Everything

Lowering RDS(on) reduces static conduction losses, preventing heat concentration and prolonging adapter life cycle.

Trench Gate SGT Technology

Utilizing advanced Split-Gate Trench (SGT) structures to balance low gate charge (Qg) with robust avalanche immunity.

Rapid Dynamic Response

Optimized input, output, and reverse transfer capacitances ensure clean switching at frequencies up to 500 kHz.

The Critical Role of Cross-Referencing in Supply Chain Resilience

Recent years have highlighted extreme vulnerabilities in the global semiconductor supply chain. Extended lead times for common, brand-name discrete parts from major manufacturers like Infineon, Onsemi, STMicroelectronics, and AOS often create production bottlenecks. A robust cross-referencing system is not merely an optional cost-saving method; it is a critical strategy for business continuity.

WINSOK acts as a premier cross-reference supplier, offering drop-in, pin-to-pin compatible alternatives for standard industry packages. Designers can quickly match parameter profiles—such as continuous drain current, gate-to-source threshold voltage, thermal resistance, and dynamic rise/fall times—to ensure a seamless transition without modifying existing PCB layouts.

Parameter Matching Criteria	Description	Critical Target in USB-C Adapters
Drain-Source Voltage ($V_{DS}$)	Maximum voltage before breakdown	Must include 20% margin above maximum clamp spikes
Static Resistance ($R_{DS(on)}$)	Channel resistance at rated gate drive	Sub-10mΩ typical for high-power synchronous rectification
Gate Charge ($Q_g$)	Charge required to turn on the MOSFET	Low values reduce driver current consumption and speed transitions
Thermal Resistance ($R_{\theta JC}$)	Heat dissipation efficiency from junction to case	Highly critical in dense, encapsulated wall chargers

Winsok Industrial Capabilities

Engineered for global deployment across diverse application fields.

600+

Active Models

40+

Discrete Packages

15-650V

Voltage Span

< 0.1%

Field Return Rate

Technical Deep-Dive: Synchronous Rectification in USB-C PD Topologies

In a standard Flyback converter design common to USB-C chargers under 100W, synchronous rectification on the secondary side is mandatory to comply with Energy Star Level VI and EU CoC Tier 2 regulations. During the off-state of the primary switch, the stored energy in the transformer transfers to the output. In older systems, a Schottky diode conducted this current, causing a voltage drop of roughly 0.5V to 0.7V. At output currents of 3A to 5A, this leads to 1.5W to 3.5W of wasted power as pure heat.

By replacing this secondary diode with an N-channel MOSFET, such as the WSD75100DN56 (75V, 100A, DFN5X6-8) or WSP6024 (60V, 15A, SOP-8L), the voltage drop is reduced to the product of current and the channel's $R_{DS(on)}$ ($I \times R_{DS(on)}$). With a typical channel resistance of only a few milliohms, this drop falls to less than 0.05V, drastically lowering thermal pressure and allowing for ultra-compact charger designs.

The challenge in these designs lies in preventing shoot-through (simultaneous conduction of primary and secondary switches). WINSOK's cross-referenced MOSFETs feature optimized reverse recovery characteristics ($Q_{rr}$) and fast switching turn-off delays to ensure reliable operations in high-frequency Continuous Conduction Mode (CCM) topologies.

Localized Application Scenarios & Compliance Standards

Power supply integration varies significantly across international markets due to diverse grid standards, local safety requirements, and typical climate exposures. In North America and Europe, chargers must conform to UL 62368-1 and CE safety requirements, highlighting safety factors such as tracking indexes, PCB creepage distances, and electromagnetic compatibility (EMC).

In tropical and sub-tropical regions (such as parts of APAC), high ambient temperatures reduce a system's thermal limits. MOSFETs operating in these regions must feature excellent thermal conductivity ($R_{\theta JC}$). Advanced packages like DFN5X6-8 and DFN3X3-8 expose a large thermal metal pad on the bottom side, which mounts directly to the copper plains of the PCB. This allows the board itself to act as an effective heatsink.

WINSOK's fabrication process ensures all components comply with international green mandates, including RoHS 2.0 and REACH. This ensures global manufacturers can export their final adapter assemblies into eco-conscious markets without compliance issues.

Corporate Profile & Distribution Strengths

Your reliable global partner in high-quality semiconductor distribution and technical integration.

Hong Kong Olukey Industry Office & Operations

Company Profile

HONGKONG Olukey INDUSTRY CO., LIMITED is a solution provider focusing on the overall solution of electronic product components. The main products mainly include: WINSOK MOSFET, Cmsemicon MCU, PCBA circuit board solution development and other three types of product lines.

At present, the products of Olukey Industry are widely used in automotive electronics, military electronics, smart industry, new energy, smart medical care, 5G, Internet of Things, smart home, and various consumer electronics products. Relying on the advantages of global general agents of major original factories, we are based in the Asia-Pacific market. Provide customers with various advanced high-tech electronic components by using comprehensive superior services, assist manufacturers in producing high-quality products and provide comprehensive services.

Why Choose Us

We use comprehensive high-quality services to provide customers with various types of advanced high-tech electronic components, assist manufacturers in producing high-quality products and provide comprehensive services. Over the years, the company has relied on reputation to survive, adhering to the tenet of "quality first, service first", and has established good cooperative relationships with many high-tech enterprises and original manufacturers at home and abroad.

Our Advantage

Relying on the advantages of global general agents of major original manufacturers, we are based on the Asia-Pacific market. Through active market development and effective resource integration, it has become one of the outstanding and fast-growing agents in the Asia-Pacific region. The company has many years of professional distribution experience. We use our comprehensive advantageous services to provide customers with various types of advanced high-tech electronic components, assist manufacturers in producing high-quality products and provide comprehensive services.

WINSOK MOSFET's product voltages are mainly medium and low voltage: 15V, 20V, 30V, 40V, 60V, 80V, 100V, 120V, 150V, 200V, 250V, 300V, 400V, 500V, 600V, 650V. The main packages include DFN3X3-8, DFN5X6-8, TO-252, TO-263, SOP-8, SOT-23, TO-220, etc. There are more than 600 models and more than 40 packages. Extensive coverage of medium-voltage and low-voltage MOSFET product lines on the market.

Cmsemicon MCU is a microcontroller company born in Shenzhen, with rich product types and technology research and development experience. Becoming a global high-value agent is the common goal pursued by OLUKEY Industrial employees. We adhere to the corporate values of "Pragmatism, Win-win, Service and Responsibility", continue to strengthen service quality, and aim to provide high-quality services. Work hand in hand with suppliers to jointly explore a larger market and contribute to the prosperity and development of semiconductors.

Technical Roadmap: The Future of USB-C Power Systems

The USB Power Delivery 3.1 Extended Power Range (EPR) specification expands the maximum voltage output of USB-C adapters up to 48V, yielding total output ratings of 240W. This forces a shift in component selection. High-voltage primary sides now require 650V superjunction structures or Gallium Nitride (GaN) primary switches. On the synchronous rectification side, output voltages up to 48V mean the secondary SR switch must block up to 100V or 120V transient spikes under full load disconnections.

WINSOK's development roadmap focuses on optimizing the figure of merit (FOM)—calculated as $R_{DS(on)} \times Q_g$. Lowering this value decreases both conduction losses and high-frequency gate drive requirements. This allows controllers to switch at higher frequencies without exceeding system thermal boundaries. Future iterations will offer integration of electrostatic discharge (ESD) protection networks directly within the gate structures of micro-DFN packages, further simplifying circuit routing and saving valuable PCB space.

Technical & Commercial FAQ

Answers to common engineering and sourcing questions regarding MOSFET cross-referencing and adapter designs.

How do I initiate a free sample request for cross-reference qualification?

To request free engineering samples for prototyping, locate your desired part number or identify the original part number you want to replace. Contact our sales department or global distributor network with your target parameters ($V_{DS}$, $I_D$, package requirements, and project annual usage details). We typically dispatch qualified evaluation samples within 3 to 5 business days.

What parameters are critical when cross-referencing a MOSFET for synchronous rectification?

Besides matching $V_{DS}$ and package footprint, pay close attention to $R_{DS(on)}$ at the target gate voltage (typically 5V or 4.5V logic level for SR controllers) and the reverse recovery charge ($Q_{rr}$). In continuous conduction mode, a slow body diode recovery can lead to high transient currents, creating voltage spikes and increasing thermal stress.

Does WINSOK provide drop-in pin-to-pin replacements for DFN5x6 and SOT-23 packages?

Yes, our catalog features direct replacements for major component brands in standard configurations, including SOT-23, DFN3X3-8, DFN5X6-8, TO-252, SOP-8, and TO-220. We maintain mechanical layout compliance to ensure no PCB changes are necessary for cross-referencing.

How does the thermal management of a DFN package compare to a legacy TO-252 package?

DFN5X6-8 packages significantly reduce parasitic inductance compared to leaded packages like TO-252. The large thermal pad on the underside of the DFN package draws heat directly out of the junction and into the copper PCB planes, resulting in lower operating temperatures despite its smaller size.